2009 GMC Canyon Owners Manual PDF | Page 292

How to Check Lubricant
To get an accurate reading, the vehicle should be on a
level surface.
The proper level is from 0 to 3/8 inch (0 mm to 10 mm)
below the bottom of the ?ller plug hole, located on
the rear axle.
What to Use
See Recommended Fluids and Lubricants on page 6-11
to determine which kind of lubricant to use.
Four-Wheel Drive
Lubricant checks in this section apply to this vehicle.
There are two additional systems that need lubrication.
Transfer Case
When to Check Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant. See Additional Required
Services on page 6-6.